<< Chapter < Page Chapter >> Page >

(iii) Table forming elements : They provide schemata for the formation of a table. They are six (6) in numbers :

    Table elements

  1. mtable : creats table
  2. mlabeledtr : creats a labelled row
  3. mtr : creates a row
  4. mtd : creats a column
  5. maligngroup : Grouping element
  6. malignmark : creats alignment markings

Child elements and arguments

Most of the elements (other than empty elements in content MathML) enclose child elements. Some of the elements, however, require that certain numbers of child elements or blocks of child elements be present. In such cases, these conditional child elements or blocks of child elements are called arguments.

Consider the example. Here “msub” element requires a minimum of two child elements. The child elements “mo” and “mi” in this example are, therefore, called arguments.


<m:math display="block"><m:msub><m:mi>A</m:mi><m:mn>1</m:mn></m:msub></m:math>

Save the file after editing as “test1.xml” and see the display. The display looks like :

A 1

Consider another example given below. Here, “mfrac” element requires exactly two arguments. In case, there are more than two child elements, then “mrow” is to place child elements in two blocks as “mfrac” would take only two arguments –first block representing numerator and second block representing denominator of a ratio. The group of child elements enclosed within each pair of "mrow" tags consitutes one argument of the "mfrac" element.

Child elements

<m:math display="block"><m:mrow><m:mi>v</m:mi><m:mo>=</m:mo><m:mfrac><m:mrow><m:mi>a</m:mi><m:mo>+</m:mo><m:mi>b</m:mi></m:mrow><m:mi>c</m:mi></m:mfrac></m:mrow></m:math>

Save the file after editing as “test.xml”. The display looks like :

v = a + b c

Creating table

We have chosen this advance topic right in the beginning with a purpose. Matter of fact, it is important to introduce this topic from the point of view of presenting display of example output in a well structured form. The basic purpose here is to acquire capability to distribute display of math content in different parts of the browser window – without taking recourse to “xml” elements. Hence, our purpose is not to know the details of creating various types of tables in mathML (we shall learn this topic in details later), but to know only elementary idea about creating table so that we get the capability to format the mathematical content display as per the requirement in hand.

For the reason cited as above, the creation of table, is limited to creating invisible table (without border) with rows and columns so that mathematical expressions are suitably placed on the matrix of the browser and is not rendered simply as a continuous line of display.

The top most table element "mtable" contains "mtr" (row) and "mtd" (column) elements. A general construct for 2 rows 2 columns is given here. It is not very difficult to infer from the code lay out that "mtr" element, following "mtable" element defines a single row, which in turn, are split in columns as defined by "mtd" elements.

Codes for creating table

<m:math display="block"><m:mtable><m:mtr><m:mtd>....</m:mtd><m:mtd>....</m:mtd></m:mtr><m:mtr><m:mtd>....</m:mtd><m:mtd>....</m:mtd></m:mtr></m:mtable></m:math>

We can now use the table matrix to fill in with the mathematical content. A simple example is given below :

Structured display

<m:math display="block"><m:mtable><m:mtr><m:mtd><m:mtext>The value of x is :</m:mtext></m:mtd><m:mtd><m:mn>10</m:mn></m:mtd></m:mtr><m:mtr><m:mtd><m:mtext>The value of y is :</m:mtext></m:mtd><m:mtd><m:mn>20</m:mn></m:mtd></m:mtr></m:mtable></m:math>

Save the file after editing as “test.xml”. The display looks like :

The value of x is : 10 The value of y is : 20

Grouping with mrow element

This topic is also a preparatory in the sense that we encounter this element now and then in any of coding effort we undertake. Its primary function within a parent element is to combine child elements enclosed between its tags as one unit for the parent element and align them horizontally. This grouping is important in order to meet the requirement of elements, which takes certain number of arguments.

The MathML coding frame work, however, is aware of the cluttering of codes due to repetitive use of this element. For this reason, "mrow" element is inferred even if not applied with certain elements. It is not necessary to remember the list of these elements capable to infer "mrow" as the same is implied logically. The elements, which require zero or one or exactly one argument, enforce child elements inside it to be clubbed together as one argument. For this reason, elements, requiring zero or one or exactly one argument, infer “mrow” even without explicit "mrow" tags. A square root element, for example, takes zero or one argument and as such implements “mrow” impicitly. Similar is the case with “mtd” element and other elements, requiring one argument. It must be understood that if there is only one child element, then there is no need to implement "mrow" for grouping either inexplicitly or explicitly.

Inferred “mrow” is a great help. Imagine if you were to write a pair of “mrow” tags for each of the “mtd” column tags for creating a simple table.

Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Got questions? Join the online conversation and get instant answers!
QuizOver.com Reply

Get the best Algebra and trigonometry course in your pocket!

Source:  OpenStax, A primer in mathml. OpenStax CNX. Apr 19, 2006 Download for free at http://cnx.org/content/col10345/1.16
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'A primer in mathml' conversation and receive update notifications?